One of them, Kepler 438b, is a possible candidate for having water and supporting life.

From a TOK perspective, you might investigate the Kepler telescope – and the methods used for discovering exoplanets. You could evaluate the certainty with which these scientific claims are being made about planets at a distance of 470 light years away. There’s also scope to consider the roles played by reason and sense perception in the production of scientific knowledge.

Real life example:

The discovery of Kepler 438b, a possible candidate for having water and therefore the chance of supporting life.

Knowledge Questions:

To what extent is our scientific knowledge certain?

In what ways do scientific knowledge claims rely on the use of reason, sense perception and language?